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Current Path : /proc/self/root/lib/python3.6/site-packages/dnf/conf/ |
Current File : //proc/self/root/lib/python3.6/site-packages/dnf/conf/substitutions.py |
# substitutions.py # Config file substitutions. # # Copyright (C) 2012-2016 Red Hat, Inc. # # This copyrighted material is made available to anyone wishing to use, # modify, copy, or redistribute it subject to the terms and conditions of # the GNU General Public License v.2, or (at your option) any later version. # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY expressed or implied, including the implied warranties of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General # Public License for more details. You should have received a copy of the # GNU General Public License along with this program; if not, write to the # Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. Any Red Hat trademarks that are incorporated in the # source code or documentation are not subject to the GNU General Public # License and may only be used or replicated with the express permission of # Red Hat, Inc. # import logging import os import re from dnf.i18n import _ ENVIRONMENT_VARS_RE = re.compile(r'^DNF_VAR_[A-Za-z0-9_]+$') logger = logging.getLogger('dnf') class Substitutions(dict): # :api def __init__(self): super(Substitutions, self).__init__() self._update_from_env() def _update_from_env(self): numericvars = ['DNF%d' % num for num in range(0, 10)] for key, val in os.environ.items(): if ENVIRONMENT_VARS_RE.match(key): self[key[8:]] = val # remove "DNF_VAR_" prefix elif key in numericvars: self[key] = val def update_from_etc(self, installroot, varsdir=("/etc/yum/vars/", "/etc/dnf/vars/")): # :api for vars_path in varsdir: fsvars = [] try: dir_fsvars = os.path.join(installroot, vars_path.lstrip('/')) fsvars = os.listdir(dir_fsvars) except OSError: continue for fsvar in fsvars: filepath = os.path.join(dir_fsvars, fsvar) val = None if os.path.isfile(filepath): try: with open(filepath) as fp: val = fp.readline() if val and val[-1] == '\n': val = val[:-1] except (OSError, IOError, UnicodeDecodeError) as e: logger.warning(_("Error when parsing a variable from file '{0}': {1}").format(filepath, e)) continue if val is not None: self[fsvar] = val